Check Engine light on 1998 BMW Z3 roadster

There is no one fix works on this O2 sensor code
P0170 - Fuel Trim Malfunction Bank 1
Possible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection

P1174 - Fuel trim adaptive malfunction (Bank 1)
P1175 - Fuel trim adaptive malfunction (Bank 2)

black plastic fuse box in the engine compartment on the left side of the car close to the firewall. The fuse is 30 Amp; it is fuse number 32 (the location diagram is on the inside of the lid on the fuse box).

What you need to do is get a scanner and pull the code(s). They will help you to know where you need to investigate next...REMEMBER the code is a clue NOT necessarily the issue. For example, a lean condition can manifest as a missfire, and you can get oxygen sensor limit errors...and these items are registering correctly (meaning replacement does nothing). Pull the codes and go from there.

This is almost as expensive as installing a used engine, around $5,000.00 to $6,000.00 the last time I checked with BMW.

try the engine breather pipes first ,if that doesnt work clean the idle control valve

Isn't there a rear sensor by the catalytic converter also?

Your car is letting you know it needs coolant.

BMW engine light

Comes on if DME engine management system self diagnostic fault detected. Will stay on until codes are called up and memory erased.

With OBD read the code as follows. Turn on ignition key, press accelerator pedal to the floor five times within 5 seconds. The check engine light will remain on for 5 sec , blik off, come on for 2,5 sec, go off for 2,5 sec and fault code will begin to flash. If more than one fault exist 2nd fault code will be separated by 2,5 sec pause. after fault codes there will be a 0.5 sec flash and light will remain off. to read codes again do procedure again.

Canceling of codes. make sure fault code is present (short blink and light goes out for long period), depress throttle pedal for at least 10 sec. read fault codes again and check for code 1444 (no faults stored.)

Check also the following, fuel pump, oxygen sensor, fuel injectors, engine coolant temp sensor, idle speed control valve, mass airflow sensor and too many other things.

There is a spray product that I used a long time ago to remove the vinyl letters off a boat. It worked great just can't remember the name. Check with an auto paint supplyer.